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首页> 外文会议>International Conference on Regional Carbon Budgets; 20060816-18; Beijing(CN) >Evaluation on greenhouse gas fluxes of the Sanjiang plain, China
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Evaluation on greenhouse gas fluxes of the Sanjiang plain, China

机译：三江平原温室气体通量评价

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The system respiration of waterlogged Carex lasiocarpa marsh and paddy field were smaller than Deyeuxia angustifolia wetland, brushwood wetland and soybean field, the system respirations are markedly controlled by soil water content and correlative with air temperature, soil temperature and the LAI at the same time. The system respiration of wetlands and agriculture become small in winter, but we still observed the CO_2 fluxes during the snow covered period. The marsh and wetlands (include paddy field) are the atmosphere CO_2 sink, and the glebe is the atmosphere CO_2 sources. The wetlands reclamation for paddy field is the reasonable wetland utilization. Nature and man made wetlands are all the atmosphere CH_4 sources. Waterlogged nature marsh, wetlands and paddy field are the main CH_4 sources, no surface water brushwood wetland are the weak CH_4 sources, and the soybean field is the thin atmosphere CH_4 sink in growth season. There are great changes of methane emission in the Sanjiang plain by marsh wetland reclamation. The farmlands methane flux are lower than wetlands, the paddy field methane flux is lower than Carex lasiocarpa marsh, waterlogged Deyeuxia angustifolia wetland, and more than no waterlogged Deyeuxia angustifolia wetland. During frozen season, we also could observe the thin methane emissions from the perennial and seasonal waterlogged wetland, and the no waterlogged wetland is the thin sink.
机译：淹水的Carex lasiocarpa沼泽和水田的系统呼吸作用比Deyeuxia angustifolia湿地，草丛湿地和大豆田要小，系统呼吸作用主要受土壤含水量的控制，并且与土壤温度，土壤温度和LAI相关。冬季湿地和农业的系统呼吸变小，但我们仍观察到积雪期间的CO_2通量。沼泽和湿地（包括稻田）是大气中CO_2的汇，而glebe是大气中CO_2的来源。稻田湿地开垦是合理的湿地利用。大自然和人造湿地都是CH_4的大气来源。淹水的自然沼泽，湿地和稻田是CH_4的主要来源，无地表水草湿地是CH_4的弱源，大豆田是稀薄的CH_4气源。沼泽湿地开垦使三江平原甲烷排放量发生了很大变化。农田的甲烷通量低于湿地，稻田的甲烷通量低于Carex lasiocarpa沼泽，淹水的Deyeuxia angustifolia湿地，并且没有水淹的Deyeuxia angustifolia湿地要低。在冻结季节，我们还可以观察到多年生和季节性涝渍湿地的甲烷排放稀薄，而没有涝渍的湿地是稀薄的汇。

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